(From left, US Cardinals Roger Mahony, Edwin O'Brien and Timothy Dolan leave the North American College to go to the Vatican's Domus Sanctae Martae, the Vatican hotel where the cardinals stay during the conclave, in Rome, Tuesday March 12, 2013. Cardinalsenter the Sistine Chapel on Tuesday to elect the next pope amid more upheaval and uncertainty than the Catholic Church has seen in decades: There's no front-runner, no indication how long voting will last and no sense that a single man has what it takes)
